NEET 2009 Physics question

In thermodynamic processes which of the following statements is not true?

(1)In an isochoric process pressure remains constantCorrect
(2)In an isothermal process the temperature remains constant
(3)In an adiabatic process
(4)In an adiabatic process the system is insulated from the surroundings

Answer: (1)

Solution

Isochoric means constant volume (not constant pressure); in such a process , so pressure changes when temperature changes. Hence statement (1) is false and is the answer. (2) An isothermal process occurs at constant temperature

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Question ID VK-090137